Malicious PDF — malware analysis report

Static analysis result for SHA-256 64f0a9be8f9e34e7…

MALICIOUS

PDF

88.7 KB Created: 2021-07-30 01:43:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 0d830906557b24fa8e94bf8eb994661d SHA-1: 701bd0b1a2e4445d12d306f54e8a369d7181fda1 SHA-256: 64f0a9be8f9e34e7bbf57a74aac5d6cc3c6b4e0b946003a2d3039ebb6c73e40c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution attempt. The 'ielts mentor reading pdf download' UTM term in one URL indicates a lure to trick users into downloading the malicious file. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://amirafouad.com/uploaded_files/file/zisamevadelemisirejerad.pdf In PDF document text
    • https://p99.tw/pro_pic/files/mejatipesosezaku.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/pofuvisago.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160704d490f5cc---51481042490.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/9edb4bfdc2553dad29ab935f8c104bdb/lovobenutab.pdfIn PDF document text
    • http://adveotec.com/img/file/50447090857.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607417fca5f75---vatalakuxelalogala.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbf6be0190---18754401425.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100ac538eaf5---buxazefiwefisa.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c84fc20974c---vemisunaxeba.pdfIn PDF document text
    • https://slezanie.eu/userfiles/file/bawogapivevadetek.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad37ece3fd7---58591621678.pdfIn PDF document text
    • http://librojuridico.com/aym_images/files/kitusad.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/89ceb1bd7774b3d225d90873cd049682/detizaro.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160803f21db3aa---tovasewenavak.pdfIn PDF document text
    • http://namngonviet.vn/user-/files/1002895672.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160f8b18b64f93---52814094328.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160871c4a394cd---pomizazilali.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/cmocfj3dk6klbnmc3m7793lvms/fitudupop.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/160726a3c8c589---mavonegomitomego.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/udp1ebo1n1q3oav36edupjacra/zoxegazifimum.pdfIn PDF document text
    • http://selfmadefilms.nl/userfiles/files/silafaraxobigegobero.pdfIn PDF document text
    • http://eldmsh1.ru/js/ckfinder/userfiles/files/78538093866.pdfIn PDF document text
    • http://xn--72c7caerxx0d3a9eve.com/UserFiles/File/wuxumuwagumezas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=ielts+mentor+reading+pdf+downloadPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF576 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010d8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D8D 10880 bytes
SHA-256: 793edcd8fc7279a9201fd2a85d5d5e09ed7c358eea6c9b9503c12f2c5d8d741a
font_02_sfnt_off0001267f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1267F 17624 bytes
SHA-256: 8be75faaebdf450a5d581feee99c821ed0769f448d5ebcad0fe35ee13f0490ca

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